Nervous System: Reflex Arc

Question 1

What is a reflex arc?

Answer 1

An unconscious reaction pathway to stimuli, it doesn’t pass through the brain which is what makes it so quick

Question 2

Step 1 of the reflex arc pathway

Answer 2

Stimuli is detected by receptors

Question 3

Step 2 of the reflex arc pathway

Answer 3

Receptor signals sensory nerve

Question 4

Step 3 of the reflex arc pathway

Answer 4

Sensory neurone passes through body and into spinal cord

Question 5

Step 4 of the reflex arc pathway

Answer 5

Sensory neurone is presynaptic neurone to relay neurone

Question 6

Step 5 of the reflex arc pathway

Answer 6

Relay neurone is presynaptic neurone to motor neurone

Question 7

Step 6 of the reflex arc pathway

Answer 7

Motor neurone is postsynaptic and travels towards the effector

Question 8

Step 7 of the reflex arc pathway

Answer 8

Effectors cause a response to the stimuli (eg muscle contraction)